Rotary deep-well drill



O. E. MURPHY ET AL ROTARY DEEP WELL DRILL Filed July '7, 1922 2 Sheets-Sheet 1 Aprifi is 1924. 1,490,180

0. E. MURPHY ET AL ROTARY DEEP WELL DRILL .Filed July 7. 1922 2"Sheets-Sheet 2 I Fetented folall iiiomitmyeamemr ent m te n. inter m rm team win or-wees, e emen neenenzneeraw-r, rate, serial in. treetohe i lmown that we, ()Rvinnn-E. Mnnrnr and Sterner We Gnsnnn, citizens of the United States, residing at Wilson, inthe county of Certerand-State of Qkl'ahoma,

, have invented certain new and useful, lm-

.provements in Rotary Deep-Well Drills, of

which the following- .is it specificetion.

' This invention relates to on improvedrrotary deep well drill and seeks, es one of itsprincipal objects, to provide n device of this character wherein the cutting blade,

may, when worn out, he readily detached hereinafter. a a

tional viewtaken m and a new hlhde substituted in lieuthereof;

.. The invention has a further object to prdvide a, drill embodying e supporting head on stock and wherein the blade will heremovably mounM upon said head so that only thehladeneed be discarded when worn. L

Another object of the invention is to provide a drill whereinthe blade will be rigidly clamped upon "the head end wherein the blade will not only he held ugeinstiside' endwise movement. And the invention has movement but will also he held against is 81,: still emulsiobject to provide a device wherein the hlnde may be detached with a minimum of dimculty.

Other and incidental objects will eppezir In the drawings: I I

Figure l is" a, fragmentary side elevation of our improved drill, r Q

Figure 2 is a detail edge elevation of the device, r f

1, Figure l is a transversesectional view on the line 4-4 of Figure 1, looking in the direction of the arrows 1 Figure 5 is a perspective ,view showing the sections of the head as well "as the disassembled,

Figure 6 is a side elevation showing a slight modi-ficationof the invention,

Fi ure 7 is a fragmentary vertical sectionel view on the line 7-7 of Figure 6,

looking in thedirection of "the arrows; and" Figure 8 is a fragmentary side' elevation showing Mun further modification,

din carrying the invention into elfect, we employ a blade 10 of therfish-tail t pe. As

shown in Figure 3, the upper on 'of this blade is tapered injtransversevertical seei tion, the blade Mtg thickest at its: upperthe blade heing vgradually thickened in transverse horizontal section from o,- point medially thereof toward its side edges. In

conjunction with the blade, we employ e I supporting stock or head which is split me dially into companion sections 12.. At its upper end this heed is formed with e tapered shank l3, companion portions oi which are carried by the sections 12, and

medial notch it to aceomrnodete the upper end of the blade, 'lhe sections 12 thus else carry companionportions ofithis notch and, as will now he observed, the notch serves to define a pair of odacting-iaws 15'' nt the lower ends of the sections. As shown in Figure 5, eachfof these jaws is formed with av-pair of oppositely slopinginner side feces 16 adapted to engage the side faces ll of the blade 10 while, es hrou'ght out in" Figure 3, the side tacw l6 ere elso tilted ver- "tic'ally so that said feces will thus he dot against theiaces 11, the faces of the jaws converging toward the lower ends of the jaws. in other words, the notch '14 is tapered in transvem vertical sectionto snii ly awommodate ,the'npper end of the bl e. Formed through the sections 12 of the heed to straddle the blade are water passages 17 and threaded upon the shank 13 of the head is a tubular collar 18 for connecting the drill with a drill stem. As will be seen, this collar will serve to bind the sections'12 of the head together and rigidly clamp the blade-l0 between the jaws 15 of the head. Thus, the faces 16 of said jaws will coact with the ,faces .11 for rigidly holding the blade against sidewise movement 'andwill' also coact with the facesll for rigidly holding the blade against andwis'e movement. The blade wlll thus be securely fixed upon the heed.f'"However, by unthreadingthe dollar from thesha'nk :13, the sections of the head ma be freely separated for releasing the b e when, of course, the blade may be. removed and a new blade substituted infllieuthereof.

formed in the lower end of the head is a.

In Figures 6 and 7 of the drawings, we

invention. In this modification, the blade is indicated at 19, the sections of the head at 20, the jaws of said sections at 21, and the collar at 22. Extending transversely through the jaws 21 and through the upper end of the blade 19 is a medially disposed locking pin 23, the jaws being counterbored at their inner sides .to accommodate said pin so that the pin will thus be held against longitudinal movement and formed at the end portions of the pin are studs 24 projecting through the jaws. Threaded upon these studs are nuts 25 accommodated in suitable recesses in the outer faces of the jaws. Thus, these nuts may be adjusted for binding the jaws against the blade in addition to the clamping action exerted by the collar 22 while the pin will also serve to provide a rigid connection between the blade an'cl'the head. Formed through the sections 20 to straddle the locking pin 23 are water passages 26 which, due to the presence of said pin, are inclined upwardly, the lower ends of said passages being staggered with respect to each other while the upper'ends of the passages lie in the same plane, Otherwise, this modification is identical with the preferred construction.

In Figure 8 "of the drawings, we have illustrated a still further modification of the invention. In this modification, the blade is indicated at 27, the head at 28, and the collar at 29. In the present instance, a pair of spaced locking pins 30 are employed, these locking pins being identical with the locking pins 23 of the PIlOI modification and extendin through the upper end of the blade and the jaws of the head binding said jaws against the blade. Formed through the sections of the head between said pins are water passages 31 similar to the assages .17. Otherwise, this modification is identical with the preferred construction and further description is accordingly believed unnecessary.

Having thus described the invention, what is claimed as new is:

A drill of the character described including a head comprising mating sections, a blade clamped between the sections of the head, a locking pin extending through the blade forming a rigid connection between the blade and head and provided at the ends thereof with reduced studs projecting throughsaid sections and defining shoulders to coact with the sections centering the pin upon the head as well as limiting the pin against endwise movement, and securin nuts carried by the outer ends of said studs securing the sections in mating relation.

In testimony whereof we aflix our signatures.

v()RVILLE E. MURPHY. [L. s.] SEBERN W. GRAHAM. [n s.] 

